DESCRIPTION

The goal of nerverot is to be interesting and compelling to watch, yet
induce a state of nervous edginess in the viewer. This manpage
describes v1.3 of the program.

OPTIONS

nerverot accepts the following options:
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
-mono If on a color display, pretend we're on a monochrome display.
-install
Install a private colormap for the window.
-visual visual
Which visual to use. Legal values are the name of a visual
class, or the id number (decimal or hex) of a specific visual.
-db -no-db Use double-buffering (or not, respectively). Double-
buffering may make things look better for larger line widths
and/or larger numbers of blots, but "better" may equate to
yielding less of the desired edginess effect. You'll be calmer
after watching the double-buffered variant; you're more likely
to go into epileptic fits with it off. Hence, it is off (false)
by default, resource doubleBuffer.
-colors integer
How many colors should be used (if possible). The colors form a
smooth ramp between two randomly-chosen colors. Defaults to 4,
resource colors.
-delay microseconds
The interframe delay, in microseconds. Defaults to 10000,
resource delay.
-max-iters integer
The maximum number of iterations (frames) before a new model is
generated. The actual number of iterations per model is a ran-
dom number between 1 and this value. Defaults to 1200, resource
maxIters.
-count integer
How many "blots" to draw at a time. This number may be rounded
down to fit the particularly chosen model, and has a fixed min-
imum per-model. Defaults to 250, resource count.
-line-width integer
The width of the lines to draw. 0 means an optimized pixel-
thick line. Defaults to 0, resource lineWidth.
-event-chance fraction
The chance, per iteration, for a life-altering event to occur
(such as picking a new rotation target), in the range 0..1.
Defaults to 0.2, resource eventChance.
-iter-amt fraction
The fraction of movement towards a target (such as rotation
angle or scale) that happens per iteration, in the range 0..1.
Defaults to 0.01, resource iterAmt.
-nervousness fraction
How nervous the drawing is, in the range 0..1. This is how
jumpy the points on each blot are. Defaults to 0.3, resource
nervousness.
-max-nerve-radius fraction
The maximum radius of blot nervousness, as a fraction of the
radius of the blot, in the range 0..1. Defaults to 0.7,
resource maxNerveRadius.
-min-radius integer
The minimum radius for a blot, in the range 1..100. Defaults to
3, resource minRadius.
-max-radius integer
The maximum radius for a blot, in the range 1..100. Defaults to
25, resource maxRadius.
-min-scale fraction
The minimum overall scale of drawing, as a fraction of min(win-
dowHeight,windowWidth), in the range 0..10. Defaults to 0.6,
resource minScale.
-max-scale fraction
The maximum overall scale of drawing, as a fraction of min(win-
dowHeight,windowWidth), in the range 0..10. Defaults to 1.75,
resource maxScale.
-fps Display the current frame rate and CPU load.

ENVIRONMENT

DISPLAY to get the default host and display number.
XENVIRONMENT
to get the name of a resource file that overrides the global
resources stored in the RESOURCE_MANAGER property.
There are resource equivalents for each option, noted above.

BUGS

nerverot should have more models.
XDBE should be detected and used, if available.
xscreensaver(1)

COPYRIGHT

Copyright (C) 2000-2001 by Dan Bornstein. All rights reserved.
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee, pro-
vided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in sup-
porting documentation. No representations are made about the suitabil-
ity of this software for any purpose. It is provided "as is" without
express or implied warranty.